(think about it...)
To a certain segment of the world, those towers themselves represented another great evil. I'm not saying that the act is any less deplorable for that: only that a great deal of ideological manipulation (in which the West was represented as "evil" FIRST) went into creating the events that transpired that day.
And what about the last major "attack on America" (Pearl Harbor) and the witch hunt of "evil" that brought about? The white supremacists think that non-whites are evil and are out to supresss THEM... George Bush has pointed out the "Axis of Evil"... but do those countries really deserve such a harsh label? During the Cold War, we demonized the USSR and communism in general, but to a great deal of the communist world we represented (and still represent) a greedy, "evil" ideology. To many in the developing world: we are an "evil" imperialist force. To fanatical muslims, Christianity is an evil cult of idolatry. In the Judeo-Christian bible it can be interpreted that everything from Harry Potter to the Easter Bunny may indeed be evil.
The point is that while it's incredibly easy to look inside ONESELF and define what is "evil": it's a great deal more difficult to look at the world OBJECTIVELY and find a situation in which one side is clearly, irrefutably acting with nothing but "evil" in mind.
Are there really people out there who believe that they THEMSELVES are evil? And if so, what is the difference between being evil and being "sick"?